Marineboy has the right idea.
Catholics have no business dating non-Catholics. Even with those of non-Catholic Christian denominations, you have a 95%chance of making it to the divorce courts, if your relationship goes in that direction. I have heard of some priests who refuse to officiate the weddings of mixed marriages.
JW’s are intensley anti-Catholic, and their theology is intensley unworkable, illogical, and insane. Forget historical facts, they have there own. By dating her, she risks being disciplined by her cult leaders for it, unless she succeeds in converting you.
Be sure to read the sites provided above, and know what you are dealing with.
kepha1